Speed-starting device for motors.



E. LABRELY.

SPEED STARTING DEVICE FOR MOTORS.

APPLTCATION min MAR. 1. 19m

1 ,300, 624,-, Patented Apr. 15, 1919.

UNITED STATES PATENT OFFICE.

EMILE LAIBRELY, 0F PARIS, FRANCE, ASSIGNOR TO PATHE FREBES PHONOGRAPH COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

SPEED-STARTING DEVICE FOR MOTORS.

Application filed March 1, 1918.

To all whom it may concern:

Be it known that I, EMILE LannfiLY, a citizen of France, and a resident of Paris, France, have invented certain new and use ful Improvements in Speed-Starting Devices for Motors, of which the following is a specification.

This invention relates to a device for quickly setting motors into rapid operation. In the form shown herein it is applied to a phonograph motor. \Vhen a phonograph it set into operation in the usual way, as by releasing the turntable, it does not get up its proper speed until the turntable has made a number of revolutions, and for this reason the tone or quality of the sound reproduction is apt to be poor at the commencement of playing and for an appreciable interval thereafter and correct reproduction is not obtained until the record tablet, which may be cylindrical or of disk form or of other forms, has gotten up the proper speed. The invention, however, may be applied to other motors and is not limited to use with a phonograph.

In the drawings forming part of this specification, Figure l is a plan view of one embodiment of my invention and showing a portion of a phonograph to illustrate its connection therewith. Fig. 2 is a vertical sectional view taken on line 2, 2, Fig. 1. Fig. 3 is a view similar to Fig. and showing the clutch members in coacting relation, and Figs. 4L and 5 are partial sectional views taken on the line 4, 4, Fig. 2 and showing in dotted lines two positions of a sector with respect to an arm on the governor of the motor.

Only enough of the motor is shown in the drawings to Illustrate the connection there with of the starting apparatus of the resent invention. The reference numera 1O designates the turntable shaft of a disk phonograph, and 11 a spur gear Secured to the shaft 10 and rotating therewith. A gear 12 on the shaft 13 meshes with the gear 11 and the governor 14 is operated through a gear 15 on its shaft 16 meshing with a gear 17 on the shaft 13. The speed starting device is illustrated in connection with the shaft 13 and preferably comprises means for setting the shaft 13 into rapid rotation, said means being automatically disconnected when the shaft 13 comes up to speed. In

the form shown the shaft 13 has a clutch Specification of Letters Patent.

Patented Apr. 15, 1919.

Serial No. 219,846.

member 18 secured thereto and rotating therewith, and a coacting clutch member 19 turns and slides loosely on the shaft 13. The sleeve or stop member 13' on the shaft 13 serves to support the clutch member '19 in its lowermost position. Means are provided for rotating the clutch member 19 and also for throwing it into engagement with the clutch member 18 on the shaft 13, and in the form shown the clutch member 19 is pro vided with or has formed thereon a spiral gear 20 having angularly arranged teeth 21 characteristic of a spiral gear, and a rotating member having spiral gear teeth of such form as to coact with the gear teeth 21 of the gear 20, is provided. In the form shown such gear member consists of a sector 22 having inclined teeth 23 on the circular portion of its periphery. The arrangement is preferably such that the gear teeth 21 and 23 continue to engage, notwithstanding bodily movement on the shaft 13 of the gear 20, and for this purpose in the form shown the gear 20 is made thicker than the sector The relation of the inclined gear teeth 21 and 23 is such that the thrust, due to the spiral character of the teeth, upon the gear 20 is toward the clutch member 18, tending to bring the driving clutch member 19 into contact and engagement with the driven clutch member 18.

As the gear 20 turns freely on the shaft 13, it is desirable to provide means for resisting to some extent the'rotation of the gear 20, so that the work done in rotatin the gear 20 from the sector 22 shall be su ficient to produce a thrust component large enough to cause the car 20 to slide upon the shaft 13 and there y to bring the clutch members into engagement. This result may be secured in a number of ways, but in the form shown a resilient member is resorted to for resisting rotation of the gear 20 and has the form of a flat spring 24, hearing against the driving clutch member 19. This spring 24 is preferably of substantial width so that it is maintained in contact with the gear 20 during the sliding movement of the latter on the shaft 13. Said sprin 24 may be secured to the bracket 25 whicii is provided for affording a support for the hear ing screw 26 of the sector 22, and which may be attached to any convenient supporting means, such as a portion of the motor frame 27.

"will be readily understo Conveniently accessible manually operable means for rotating the sector 22 are provided, and the same preferably extend to the exterior of the phonograph or other cabinet or device 28. In the form shown a handle 29 is provided passing through an aperture 30 in the wall of the cabinet 28 and secured thereto is a slide member 3f which may be mounted in any convenient way for sliding, as, for example, it may have a slot 32 in which is received a bolt or screw 33 which may be mounted in any suitable support as a bracket 34. The slide 31 is connected to the sector 22 so that when said slide 21 is moved longitudinally by the handle 29, rotary movement is imparted to the sector 22. In the form shown the sector 22 has an arm provided with a slot 36, and the slide 31 is provided with a screw 37 firmly secured thereto and adapted for longitudinal movement in the slot 36. Other forms of connection between the slide 31 and the sector 22 may be resorted to for the purpose named, or the member 31, if desired, may be mounted in other forms of supports than that shown so that, for example, it may move laterally as well as have direct sliding movement.

The structure so far described is Well adapted for use with the ordinary phonograph having the ordinary so-called starting means which consists only of a releasing lever adapted to be held in contact with or moved away from the turntable. Movement of the handle 29 to impart an initial spin to the motor may also serve to release the motor, leaving it free to operate. In the form shown means are operated from the handle 29 for stopping the motor by interposing a member in the path of the governor or part attached thereto, and for releasing the mechanism of the motor by being withdrawn from such, th of movement. For this purpose I ave shown a pin 38 secured to the sector 22 and ezjrtendmg in the ath of an arm 39 secured to the shaft 16 at the governor 14,, Such arm 39 is preferably of ight sprin and is preerably secur to the sha t 16 being wound artially therearound and t en inserted t erein or fastened thereto so as to ease the shock when strikes against the in 38 to stop the motor. This is but one orm of motor releasin and stopping means interconnected Wit the handle 29 and the motor spinning device of the present invention, and other modes of obtaining the same result may be resorted to within the scope of my invention. p

The operation of the ap aratus described ad from the foregoing. When the motor is at rest and the handle 29 is in, corresponding position, here shown as the full'line position in 1 in \vhich the handle 29 is pushed inward to its limit of movement, the gear 20 is in substantiall the position shown in Fig. 2, and the par is in co tact with the arm 39 on the governor sh'a t, as shown in Fig. 4. Manual operation of the handle 29, as, in the form shown, by Withdrawal to Hotted line position in Fig. 1, removes the pin 38 from the neighborhood of the arm 39, the extreme removed position being substantially that shown in Fig. 5, and by coaetion of the gear teeth 23 and 21, the gear 20 is rotated from the pinion 28. The movement of the gear 20, however, is resisted somewhat by the spring- 24 so that coaction of the inclined gear teeth 21 an-d23 produces a thrust action upon the gear 20, bringing the driving clutch member 19 into engagement with the driven clutch member 18. whereupon the rotation of the gear 20 is imparted to the shaft 13, setting the motor into rapid operation. The backs 40 of the clutch members 18 and 19 are preferably inclined substantially as shown so that as soon as the speed of the shaft 13,which is actuated not only by the gear 20 but also by the motor of the phonograph or other instrument, exceeds the speed of rotation of the gear 20, the gear 20 is backed oft and the clutch members are automatically disengaged.

It will be seen that the device of the present invention affords ellicient means for setting a motor into rapid operation, and that in the case of a phonograph, for example, superior reproduction effects can be obtained, as the phonographi-e tablet can be brought up to speed without any substantial interval durin which the character of the repro ueti is unsatisfactory due to the tablet trave ing at a speed less than that at wh ch it was intended fob reproduced. In this wag itbeoomes pGSSib. to secure add-itronal ngmof race (1 with increase in t sine of p v aha, as t e customary blanlrgrooves e t at the b "ginning i a r 1. t eret ae 1 uliiibiu b g a a met Pe ta let to come up to speed before the sauna undulations to reproduced are encountered, maybe su i reduced immber and the sound 1' aadnaaaaa may practical witl i t tement o the record leave, oris most wi in on or two turns o he end o? the groove,

.1; waits as paratas herein diselosed is intende only; illusand a a1 r u ilimaime ii Iameoeoawe, an

fined thereto u't rose" to. such changes in ifications as are incliided within the see I o my claims by which the invention is 1. Theeombina with a. motor comprising a shaft and riving means therefor, or

means for accelerating the movement of said shaft comprising a fixed clutch member and a sliding clutch member, and a pair of spiral gears, the driven gear of said pair serving both to rotate the sliding clutch member and to slide same on said shaft into coaction with the other clutch member, the clutches bein adapted to be automatically disconnect when the speed of the fixed clutch member exceeds that of the other clutch member.

2. In a motor starting device, a driven clutch member, a drivin clutch member, means for rotating said drivin clutch member and imparting thereto a t rust in a direction toward said driven clutch member,

and means for resisting rotation of said driving clutch member.

3. In a motor starting device, a driven clutch member, a drivin clutch member, means for rotating said driving clutch member and imparting thereto a thrust in a direction toward said driven clutch member, and spring means for resisting rotation of said driving clutch member.

4. In a motor starting device, a driven clutch member, a drivin clutch member, means for rotating said driving clutch member and imparting thereto a thrust in a direction toward said driven clutch member, and a spring bearing against said driving clutch member for retarding the rotation thereof.

5. In a motor starting device, a shaft, a driven clutch member fixed to said shaft, a driving clutch member rotatable and slidable on said shaft, a spiral gear on said driving clutch member, a second spiral gear meshing with the first-named spiral gear, the teeth of said gears being inclined to thrust said driving clutch member toward said driven clutch member, means for rotating the lastnamed spiral gear, and spring means for regarding rotation of said driving clutch mem- 6. In a motor startin device, movable means for imparting an mitial spin to the motor, means whereby same is automatically released as the speed of the motor increases, and means connected therewith and adapted in one osition thereof to extend within the path 0 a movable element of the motor, and when operated to spin the motor to be with drawn from such path of movement.

7. In a motor starting device, a shaft, a driven clutch member fixed thereon, a driving clutch member free to turn and slide on said shaft, a spiral gear on said drivin clutch member, a spring bearing against sai spiral gear, a sector having spiral gear teeth adapted to coact with the first-named spiral ar, an arm projecting from said sector into the path of a movable element of the motor and adapted, when the sector is turned to rotate said driving clutch member, to be withdrawn from the path of movement of such element, and means including a slide and a handle for imparting rotary move ment to said sector.

In testimony that I claim the foregoing, I have hereto set my hand, this 23rd day of February, 1918.

. EMILE LABRELY.

Copies 01' this patent may be obtained for in cents each, by addressing the "Commissioner of Patents, Washington, D. G. 

